Traduction :
to have never met sb before (idiom); entirely unacquainted; a complete stranger; not to know sb from Adam
Référence :
昧：不了解；平生：平素、往常。彼此一向不了解。指与某人从来不认识。
Origine :
唐·李商隐《赠田叟》：“鸥鸟忘机翻浃洽，交亲得路昧平生。”
Exemple :
其在前曰：真为～，突如其来，难怪妾之得罪。（元·王实甫《西厢记》第二本第三折）
Annotation :
素昧平生1
1. sùmèipíngshēng :
[EN] to have never met sb before (idiom); entirely unacquainted; a complete stranger; not to know sb from Adam
